An unintended action that can either result in 1. great success or 2. colossal failure. Made popular by YTMND, it's a fad that is pretty much dead. Most epic maneuvers result in failure, and you'll be remembered for such actions.

Examples of an epic maneuver:

1. You're bowling and you throw the ball, but it results in a 7-10 split. On the next ball, through some miracle, you throw it and you manage to knock both pins over.

2. Let's say you're the QB in a football game. After the snap, when you're poised to throw, your fingers lose grip of the ball and it results in a fumble, which is recovered by the opposing team.